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    <title>数字社区 | Mars3D | 三维地图 | 火星科技 | 合肥火星科技有限公司</title>

    <!--第三方lib-->
    <script
      type="text/javascript"
      src="../lib/include-lib.js"
      libpath="../lib/"
      include="jquery,font-awesome,bootstrap,layer,haoutil,mars3d"
    ></script>

    <link href="css/style.css" rel="stylesheet" />
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  <body class="dark">
    <!--加载前进行操作提示，优化用户体验-->
    <div id="mask" class="signmask" onclick="removeMask()"></div>

    <div id="mars3dContainer" class="mars3d-container"></div>

    <script src="./js/common.js"></script>
    <script type="text/javascript">
      "use script"; //开发环境建议开启严格模式

      var map;

      function initMap(options) {
        //合并属性参数，可覆盖config.json中的对应配置
        var mapOptions = mars3d.Util.merge(options, {
          scene: {
            center: { lat: 31.818816, lng: 117.221131, alt: 2553, heading: 0, pitch: -55 },
          },
        });

        //创建三维地球场景
        map = new mars3d.Map("mars3dContainer", mapOptions);
        map.basemap = 2017; //切换到蓝色底图

        addTilesetLayer();
        addGraphics();
      }

      //合肥市建筑物模型
      function addTilesetLayer() {
        var fragmentShader = `
          // 注意shader中写浮点数是，一定要带小数点，否则会报错，比如0需要写成0.0，1要写成1.0
          float _baseHeight = 0.0; // 物体的基础高度，需要修改成一个合适的建筑基础高度
          float _heightRange = 25.0; // 高亮的范围(_baseHeight ~ _baseHeight + _heightRange)
          float _glowRange = 300.0; // 光环的移动范围(高度)

          // 建筑基础色
          float mars_height = marsJzwHeight - _baseHeight;
          float mars_a11 = fract(czm_frameNumber / 120.0) * 3.14159265 * 2.0;
          float mars_a12 = mars_height / _heightRange + sin(mars_a11) * 0.1;
          gl_FragColor *= vec4(vec3(mars_a12), 1.0);// 渐变

          // 动态光环
          float time = fract(czm_frameNumber / 360.0);
          time = abs(time - 0.5) * 2.0;
          float mars_h = clamp(mars_height / _glowRange, 0.0, 1.0);
          float mars_diff = step(0.005, abs(mars_h - time));
          gl_FragColor.rgb += gl_FragColor.rgb * (1.0 - mars_diff);
       `;

        var tiles3dLayer = new mars3d.layer.TilesetLayer({
          name: "合肥市建筑物",
          url: "//data.mars3d.cn/3dtiles/jzw-hefei/tileset.json",
          maximumScreenSpaceError: 1,
          maximumMemoryUsage: 1024,
          marsJzwStyle: fragmentShader,
          style: {
            color: {
              conditions: [["true", "rgba(16, 119, 209, 1)"]],
            },
          },
        });
        map.addLayer(tiles3dLayer);

        //模型裁剪
        var modelThing = new mars3d.thing.TilesetClip({
          layer: tiles3dLayer,
          positions: [
            [117.22648, 31.827441],
            [117.210341, 31.830612],
            [117.211311, 31.842438],
            [117.226091, 31.842885],
          ],
          clipOutSide: true, //外裁剪
        });

        map.addThing(modelThing);
      }

      function addGraphics() {
        //创建矢量数据图层
        var graphicLayer = new mars3d.layer.GraphicLayer();
        map.addLayer(graphicLayer);

        queryAreasData().then(function (geojson) {
          let arr = mars3d.Util.geoJsonToGraphics(geojson); //解析geojson

          for (let i = 0; i < arr.length; i++) {
            let item = arr[i];

            //polygon面
            var polygonEntity = new mars3d.graphic.PolygonEntity({
              positions: item.positions,
              style: {
                color: item.attr.color,
                opacity: 0.4,
              },
            });
            graphicLayer.addGraphic(polygonEntity);

            //PolylineEntity线
            var graphicLine = new mars3d.graphic.PolylineEntity({
              positions: item.positions,
              style: {
                width: 4,
                closure: true,
                // clampToGround: true,
                material: mars3d.MaterialUtil.createMaterialProperty(mars3d.MaterialType.LineTrail, {
                  color: item.attr.color,
                  speed: 4,
                }),
              },
            });
            graphicLayer.addGraphic(graphicLine);

            //动态边框文本 DIV
            var graphic = new mars3d.graphic.DivBoderLabel({
              position: polygonEntity.center,
              style: {
                text: item.attr.name,
                font_size: 15,
                font_family: "微软雅黑",
                color: "#ccc",
                boderColor: "#15d1f2",
                addHeight: 100,
              },
            });
            graphicLayer.addGraphic(graphic);
          }
        });
      }

      function queryAreasData() {
        return new Promise(function (resolve, reject) {
          $.ajax({
            url: "//data.mars3d.cn/file/geojson/hefei-shequ.json",
            type: "get",
            dataType: "json",
            success: function (geojson) {
              resolve(geojson);
            },
            error: function (data) {
              reject(data);
            },
          });
        });
      }
    </script>
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